1. 21/4 , you can use a calculator it’s way easier because your doing times
Answer:
86.7%
Step-by-step explanation:
40/300 * 100% is 13.3%, 100%-13.3% is 86.76%
(3 is repeating)
In hours it’s 9 hours and 78 minutes
Answer:
3. ΔABC ≅ ΔCDA. Reason: HL postulate
Step-by-step explanation:
The two triangles are right triangles (∠B ≅ ∠D = 90°) and one leg (BC, DA) and the hypotenuse (AC, CA) are shown to be congruent. So, the HL postulate applies. The only step needed is to refer to that postulate.
Step 3. ΔABC ≅ ΔCDA. Reason: HL postulate
Apply the radical rule to separate terms:
Cubicroot(-27) and cubic root(n^27)
Cubicroot(-27) = -3
Now you have -3 cubicroot(n^27)
Using the exponent rule
N^27 can be rewritten as (n^9)^3
Now you have -3 cubicroot((n^9)^3)
The cubic root and the 3rd power cancel out to get the final answer of
-3n^9